# -*- coding: UTF-8 -*-
from leetcode_helper import TestcaseHelper, SolutionBase


class Solution(SolutionBase):
    # 解题的方法，命名和Leetcode的保持一致即可
    def lastRemaining(self, n: int) -> int:
        a1 = 1
        k, cnt, step = 0, n, 1
        while cnt > 1:
            if k % 2 == 0:  # 正向
                a1 += step
            else:  # 反向
                if cnt % 2:
                    a1 += step
            k += 1
            cnt >>= 1
            step <<= 1
        return a1


if __name__ == '__main__':
    solution = Solution()

    # 按照leetcode的题目说明，将基本的test case填入
    # 每条case的最后一个元素是正确的结果，即期待的结果
    # 使用元组来保存输入的数据，期待的结果
    testcases = [
        (9, 6,),
        (1, 1)
    ]

    for case_item in testcases:
        # 获取测试用的case和期待的执行结果
        input1 = case_item[0]
        expect = case_item[len(case_item) - 1]
        exec_result = solution.lastRemaining(input1)

        # 判断执行结果，输出提示信息
        check_result = solution.check_result(expect, exec_result)
        TestcaseHelper.print_case(check_result, case_item, exec_result)

